Construction of fireproof buildings



March 13, 1928. 1,662,480

H. soRENsEN CONSTRUCTION OF FIREPROOF BUILDING Original Filed Dec. 7. 1925 4f. /ff /a s. i

INVENTOR Patented Mar. 13, .1928.

UNITED STATES HENBYSOREN SEN, lOF SAN FRANCISCO, CALIFORNIA.

I CONSTRUCTION 'OF 'FIREPROOF .BUTLDINGS.

Original application led December 7, 1925, Serial Nonll?.#Divided-and this application-filed April `10,

1926. lSerial No. :101;223. i 1 i :erete lis poured, but with the concrete in ,see-v ution shown Iin the lower .Walls :on :both fsides,

and in lthe beam `under the :middle 'dioolx v 1 Fig. 2 is a Gross section ofF ig. lata-fw,

the concrete is poured and after 'the :trames are iremoved.

Fig?) is a*longitudinalseotionof Fig. lat

the frames are removed.

Figures 4, 5, and 6 areenlarged fragments of vparts illustrating my invention.

Fig. 37 illustrates the enlarged fragment of 'a reinforcement Arod.

-In the drawings, Where similar numerals indicate `similar parte, numerals l designate lthe 4forinszfor the concrete. Numerals 2fdesignate lmain angular Wedgeis'haped pairs `of `steel Ibands, which, together with their lintervening Jconcrete filling i6, form fthe `main angular 'Wed eshaped supports which carry the floors. -umer-a-ls y3 designate lateral 3o Wedgeshlwped pairs of Ysteel "bands, which,

together with their 'intervening noonorete ifilling '16, form the lateral angular `Wedge shaped supports which lcarry the floors.

N urnerals 4 designate the horizontal iflanges lconnected With `bands 2 andwith bands 3.

"Numerals 5 idesignate Eholes Arin r`bands 2.

Bolts 6 jpass through :holes 5. Beam '8 `is supportedf-by columns, not shown. Walls 7 `and `lloeam 8 serve as supports for the ymain turn, the lateral pairs of angular Wedge- .shaped lbands I place band reinforcements 15 bet-weenfthe pairs of main lbands 2,

or fbetween they Apairs fof lateral bands 3, or v '8, besides 4theziiat ,sur-face 1upon which the .eonereteloor fis ieast. "che kflat surface l vis iiush 'with the top ,of beanis8. I yplace the pairs of bands 2andthe 'pairs of bands 3, upon 'their respective :flanges '4, on `the sul# .-aee for forms l. Due ,to the fact that ,the flanges `.forni .acute angles, the sides of bands V:2, und ,bands `I3, are sloping, and .I #place :these pairs of ba-nds t2 and with their sloping :sides npwardztowards a point. I'leavethe individual hands, Lof the `pairs oit' bands .2, and the individual '.bands, uof the pairs :of loands .3, .at a suitable distanceapart, form- -fing openings 11, for the .reasons which I will :show hereinafter. AThe `shape yoi' ythe main .pairs `of bands 12, :and the Yshape yoit the v.lateral pairs olf ibands y3, Jareidentical, ibut il give fthe :ends oi bands 3 `a slope, which corresponds to `the :slopes of the .sides yof bands :2. I place the pairsiof bands 3 crossways,.in1their relation sto lthe pairs of bands 2, .so that 4hands f3 reach from the `slope "of the sides-oil one :pair of bands `2 to the 'slopeof the sides of thefother pairof bands 2, and athe:slopingends.of bands?) will -tlien rest upon `the sloping sides of lbands 2.o `As -I have stated aloove the main pairs of bands i2 are supported by Walls 7 land rbearn 8, and, due to the sloping ends of bands 3, which :rest on the-sloping sides ofi'bands 2,'thepairs of ina-in bands 2 lwill, in turn, support the `lateral pairs o-f bands 3. 4Said main bands f 2 are, preferably, inade of heavier material than the 'lateral bands 3. Y p

this WayV the pai-rs of main bands 2, together with'the pairs of lateral lbands 3, form rectangular Wedgeshaped seats 9 in which kConcrete l0 rests. -Concrete l0 is -wedged between the reotangularseats '9 and rcan get nowhere. By "means lof kbol-ts 6,4 through holes 5, ,IA interlockl bands 2 .and anchor said bands 2 to Walls 7 and to ybeam '8,as shown at l2 and 1301-1 Fig. l. By ,plae

ing the pairs of bands 2 `and 3, `either closer or lfurther apart, I decrease, Vor increase, the carrying Icapacity o'f vthe floors.

I strengthen walls 7 against the tension, caused by main bands '2, by placing pairs of bands '2 `vertically in Walls 7, as 'shown "in Fig. l. These Vertical pairs of bands 2 reach "r'roin iioor` to floor, "and are placed with their vflanges 4 resting against the sides of the concrete tloors. The tension, caused by the n'iain lloor bands 2, in walls 7, is thereby counteraeted by the resistance derived .troni the whole area of the concrete lloors thi'fmselves.

Fig. T is an enlarged fragment of a seetion o1 the reinforcements 15 resting on one of the .sloping sides or the pairs of bands 3, to which l have referred above. Said reinforcements 15 may be ol any known shape, but l preter to gire reinforcements 15 sloping ends, as shown, so that the sloping ends ot' 1.3 may lit against the sloping sides of bands Il or bands ln Figures 1, 2 and 3 l hare shown reinforcements 15, placed ero.-s\\'ays, applied in seats i).

lllhcnerer it becomes necessary to strengthen my angular wedgeshaped pairs of bands il, l do so by adding sections of pairs of bands together, as shown in Fig. (3, which is an enlarged cut talien at Gmc on Fig. l. I piace pins 17, between bands 2, to hold said bands apart, to allow concrete 10 to readily llow between the sides of said sections of' pairs of bands E2. The same strengthening method can be applied to the pairs ot bancs 3. Bolts (5 interlock said sections of said pairs ot bands 2, besides anchoring the same to concrete l0. At l2 I have shown the pairs ot bands lengthened by letting flanges` 1 overlap each other, with bolt o' placed between the overlapping ends. lly so doing I obtain a leverage between bolt ti and flange 1-, which will hold the lengthened sections of bands El in line. At the other places, on Fig. 1, I have shown the sections of; the pairs` ot bands 2 added together by placing their ends side by side.

Fig. is a cross section of Fig. 1 at a-a, ailier concrete 1() is poured and after forms l are removed.

l have stated that the individual bands 2, and the individual bands 2l, are placed at a suitable distance apart, so that there is an opening l1 at the top edges of the pairs ot bands 2 and 3. This is done to allow1 concrete lt), when poured, to run through 11 and torni the concrete [illing 1G, inside of the said pairs of bands E2 and 3. This cons crete lilling 1G. together with bands 2 and mil, forni lhe main angular wedgeshaped supports and the lateral angular wedgeshaped supports il, and, which, in turn, form the rectangular angular wedgeshaped seats 9.

Beam El. is strengthened by placing pairs of bands l lengthways, m the lower part of beam En'. and said bands :2 are anchored to the columns (not shown) which support beam tl. ./es shown at l2 the sections of the pairs ol bands 2 rest on beam S and are interloeked, and anchored, in concrete 10 by means ot bolts (i. it 13 the pairs of bands 2 are shown supported by walls 7 and interloclied, and anchored, in concrete 10 by means of bolts (i. Fig. 3 is a longitudinal nena/leo section of Fi. 1 at b-b, after concrete 1U is poured and the form 1 removed.

Fig. l illustrates the frao'ment of an enlarged cross section of bancs 2, or bands il, as they7 appear after concrete 1() is poured, showing concrete lilling 16, as well as concrete 1t) wedged upon the outside sloping surface of bands 2 and 3. Flanges 11 hold concrete lilling 1b in place inside of bands 2 and Ll.

Fig. 5 illustrates an enlarged cross section ot the main pairs ot' bands 2, with a fraginental sideview of the sloping ends, ol the lateral pairs of bands 3, resting on the sloping side of band 2.

The pressure, from the loors, on the sloping sides of the pairs of bands 2, and on the sloping sides of the pairs of bands 3, cannot displace said pairs of bands, because the pressure from the Hoor on the one side of said bands counteracts the pressure on the other side. In other words the weight on the floor holds said pairs of bands in place.

The tension, which is caused by the weight ot' the floors, is taken up by the pairs of bands The lloor is prevented from buck ling, between the main pairs of bands 2, by lateral pairs ot' bands 3, and the tension in concrete 10, between the lateral pairs of bands 3, is, in turn, taken up by means ol reinforcements 15, as above described.

By placing the reinforcement bands on their edges l stillen the reinforcements and thereby greatly increase their usefulness. rthe large surface area, of the bands, as compared with round or square rods, will, further, give the ireproof materials greater contact sui-tace ywith the steel, and thereby lessen the tendency for the tireproo inaterial to slip on the steel. The simplicity of the structure is a great saving in the cost of erection of the buildinff. Other modifications may be made without departing from the spirit of my invention.

1. In reinforcements embedded in the inlilling ot ireproof floors, main pairs of lvertically extending spaced bands in combination with lateral pairs of vertically ex tending spaced bands intern'iediate said nlain pairs of bands, said pairs of bands extending from the bottoni oi said floor, the individual bands of said pairs of bands sloping towards each other, openings between the edges of said pairs of bands accessible for said ilinlling, and ineans to attach said main bands to the supports of said floors, whereby the rectangularly shaped sloping sides of said pairs of bands form individual preferably reinforced wedgeshaped slabs when said inflling is poured.

2. In reinforcements embedded in the inlilling of lire roof floors, main pairs of vertically exten( ing spaced bands in combinasaid inilling, horizontal flanges attached to` the base edges of said bands, sloping ends of said lateral bands adapted to rest against I the sloping sides of said main bands, and means-to attach said main pairs of bands to the supports of said floors, whereby the rectangularly shaped sloping sides of said pairs of bands form individual preferably reinforced slabs when said inlling is poured.

HENRY SORENSEN. 

